Q. 54.0( 9 Votes )

A bus is travelli A. 17 km/h

B. 17.8 km/h

C. 18 km/h

D. 20 km/h

Answer :

Let the total distance be 100 km


One third of 100 km = 33.33 km


time =


t1 = = 3.33 hr


Distance left = 100 km – 33.33 km = 66.67 km


One fourth of 66.67 km = 16.67 km


t2 = = 0.83 hr


Remaining distance = 100 km – 33.33 km – 16.67 km = 50 km


t3 = = 1.25 hr


t1+t2+t3 = 5.41 hr


Average speed = = = 18.4 km/hr

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